March 2003
Intermediate to advanced
912 pages
27h 17m
English
Content preview from Operating Systems: Concurrent and Distributed Software Design
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21.3. Concurrency, crashes and the properties of transactions
The ACID properties of transactions must be guaranteed by a TPS in the presence of concurrency and unpredictable failures.
| Atomicity | Either all or none of the transaction's operations are performed. This must be ensured by the recovery manager. A crash may occur part-way through a transaction and the invocations of any incomplete transactions must be undone. |
| Consistency | A transaction transforms the system from one consistent state to another. This is achieved through concurrency control, provided that atomicity is guaranteed by the recovery manager in the presence of crashes. |
| Isolation | An incomplete transaction cannot reveal its result to other transactions before it is committed. This ... |
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